Kichikhan-Yuly Fm
Period:
Jurassic
Age Interval:
Middle Callovian (J3), Sar2
Province:
East Tajik (easternmost Pamir)
Type Locality and Naming
Includes in Sarykoln district (Istyk type section (Kokchagin area)
Synonym: Kichikhan-Yuly Suite
Reference section:
Lithology and Thickness
It consists of gray, medium and coarse-bedded nodular clayey limestones. (50 m)
Lithology Pattern:
Clayey limestone
Relationships and Distribution
Lower contact
Schematic stratigraphic column indicates the lower contact as Kokichegeashui Fm
Upper contact
Schematic stratigraphic column indicates the upper contact as Khan-Yuly Fm
Regional extent
In the Kokchaginsky area, in the basin of the rivers Zhilgakochusu (Kokchagi), Khan-Yuly.
GeoJSON
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Fossils
It contains abundant remains of fauna, including the following pteriomorphs: Pinna lanceolata Sow., Plagiostoma streitbergense Orb., P. cf. astartina Thurm., Pseudolimea alternicosta Buv., Lopha eruca Defr., Falcimytilus ex gr. asper Mor. et Lyc.
Age
Based on the remains of the fauna and its position in the section, the suite is considered Middle Callovian.
Age Span:
Beginning stage:
Callovian
Fraction up in beginning stage:
0.4
Beginning date (Ma):
163.79
Ending stage:
Callovian
Fraction up in the ending stage:
0.7
Ending date (Ma):
162.66
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Extracted from Baratov, R. B. (1976). Subdivisions of stratified and intrusive rocks of Tajikistan. Donish, Dushanbe, 276.